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No. 6l9.553. Patented Feb. I4, 1899.

E. L. FOX.

NIPPLE HOLDER.

(Application filed Oct. 21. 1896.,

(No Model.)

Mimi/[film gwvewbo'a g1 Mi after/wag UNITED STATES PATENT FFICE.

HALF TO FRANCIS L. MILLEA, OF SAME PLACE.

NIPPLE-HOLDER.

SPECIFICATION forming part of Letters Patent No. 619,553, dated February 14, 1899.

Application filed October 21, 1896- Serial No. 609.585. (N0 model.)

T0 at whom it may concern/.-

Be it known that I, ERNEST L. FOX, a citizen of the United States of America, residing in Springfield, in the county of Hampd en and State of Massachusetts, have invented new and useful Improvements in Nipple-Holders, of which the following is a specification, reference being had to the accompanying drawings and letters of reference marked thereon, in which drawings like letters of reference indicate like parts.

Figure 1 is a side view, partly in longitudinal vertical section, illustrating myimproved device. Fig. 2 is a side View, partly in longitudinal section, showing the threads on the chuck-rod in reverse pitch from those in Fig. 1. Fig. 3 is an end view of the attaching-collar. Fig. 4 is a side view of the same with a part in section; and Fig. 5 is a perspective View showing the end portion of the chuckrod, having the teeth arranged on a square instead of a tapering end.

In detail, 0, indicates the chuck-rod. b indicates threads thereon; a, atapering and serrated end portion; d, a coupling sleeve or holder; 6, nipple-engaging threads therein; f, threads to engage the threaded part on the chuck-rod, and g a nipple.

Heretofore in the manufacture of nipples it has been found exceedingly difficult to hold the nipple while threading it at one end and for other purposes where it becomes desirable to hold the same rigidly in position. The object of my invention is to overcome this difficulty and to provide a device by which a nipple or other similar piece of material may be readily grasped and firmly held for treatment.

I accomplish the objects of my invention by the construction herein shown.

The body portion of the chuck rod may be held in any of the well-known and convenient methods now employed. Ordinarily it is held in a suitable head or chuck. The projecting end portion of the chuck-rod is tapered and the tapering surface provided with a series of serrations or longitudinal notches, thus producing projecting teeth which bite into the material being grasped and prevent the same being easily turned. Adjacent to the tapered portion above referred to is a thread I), adapted to engage a similar thread upon the interior of the coupling sleeve or holder cl, and the opposite end of the coupling sleeve or holder 01 is interiorly threaded to engage a thread upon the exterior of the nipple or other material to be operated upon.

In Fig. 1 the thread I) is shown as a lefthand thread, and in order to engage the nipple the coupling-sleeve in the first instance is turned so as to project a short distance toward the tapered end portion of the device, and the nipple is screwed into the coupling-sleeve slightly. The coupling-sleeve is then turned so as to draw the nipple toward the tapering surface until the inner surface of the nipple bears against the teeth on the tapered portion with sufficient force to bite the same,

at which time it will be found that the prosleeve when the nipple is at rest will have a tendency to unscrew the coupling-sleeve from the nipple, yet the increase in the pitch of the screw upon the chuck-rod in excess of the pitch of the thread engaging the nipple is such that the nipple will be drawn toward the engaging teeth, and thus held firmly in position. ferent shape, size, the. Bushings may be used in the nipple-en aging end of the couplingsleeve to adapt the device for smaller nipples; but I find a better result is attained by having an independent coupling-sleeve for each size of nipple-2'. 8., the nipple-engaging end of the coupling-sleeve will for smaller nipples The teeth may of course be of dif-.

have a smaller opening and'threaded for the size of nipple or other like piece to be operated upon. I

It will be perceived the action or function of the parts is that the rotation of the coup ling-sleeve on the chuck-rod with the nipple screwed therein is to draw the nipple in a direct line with the axis of the chuck-rod, where it is held for the time being against rotation by engagement with the serrations on the chuck-rod, and then when the nipple has been threaded the reverse rotation of the couplingsleeve, owing to the difierential relation of the threads therein, will move the nipple directly away from engagement with the chuck-rod.

Although I deem the best construction to be that wherein the teeth which engage the nipple or like piece are arranged on a tapering end of the chuck-rod, yet a successfullyoperating device may be produced by having the end of the chuck-rod out off square and the teeth formed on the square end, as shown in Fig. 5, and other-shaped teeth or engaging projections may of course be employed without therefore describing all modifications which might be employed.

What I claim, and desire to secure by Letters Patent, is

A nipple-holder comprising a chuck-rod provided with quick-pitch screw-threads adjaeent to its nipple-engaging end and formed with a nipple-holding end provided with serrations to engage and hold a nipple While bein g screw-threaded,and a coupling-sleeve provided with interior right and left hand screwthreads at its opposite ends: those at one end to engage the quick-pitch threads of the chuckrod and differential threads at the other end to engage and hold the nipple, substantially as described.

ERNEST L. FOX.

Witnesses:

ALLEN WEBSTER, BASIL YANDO.

It is hereby certified that the name of the assignee in Letters Patent No..619,553,

granted February 14, 1899, upon the application of Ernest L. Fox, of Springfield, Massachusetts, for an improvement in Nipple-Holders, was erroneously written and printed Francis L. Millea, whereas said name should have been written and printed Francis J. Millea; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed, countersigned, and sealed this 28th day of February, A. D., 1899.

[SEAL] WEBSTER DAVIS,

Assistant Secretary of the Interior. Oountersigned O. H. DUELL,

Commissioner of Patents. 

